Magnetically tunable laser with wavelength latchability and opti

Details Magnetically tunable laser with wavelength latchability and opti Magnetically tunable laser with wavelength latchability and opti

1998-09-22

1999-12-07

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Tuning

372 37, 372 64, 372 6, 372102, 372 99, 385 37, H01S 310

Patent

active

059995467

ABSTRACT:
In accordance with the invention, a tunable laser uses magnets to apply mechanical strain on fiber Bragg grating reflectors or laser cavities in order to induce a change in lasing wavelength. The strain can be tensile or compressive. The tunable laser comprises a laser cavity including a laser material for emitting light in response to stimulating light and two end reflectors one or more of which can be a Bragg grating. In preferred embodiments, latchable programmable magnets vary the grating periodicity and/or cavity length in a controlled, accurate manner so as to achieve desired tuning of the laser over a broad range of wavelengths. The latchable magnets hold the wavelength in the shifted position without the need for sustained power.

REFERENCES:
patent: 4397025 (1983-08-01), Kebabian
patent: 5317576 (1994-05-01), Leonberger et al.
patent: 5781677 (1998-07-01), Jin et al.
patent: 5790573 (1998-08-01), Heller

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